Plot

There's a serial killer on the loose. His macabre calling-card: to leave the ABC Railway Guide beside each victim's body. But if A is for Alice Ascher, bludgeoned to death in Andover, and B is for Betty Bernard, strangled with her belt on the beach at Bexhill, then who will victim C be?
Hercule Poirot is intrigued by this murderer's mind. Something just doesn't ring true about a psychopath who lays his clues so carefully.